Husqvarna 340, 345, 346XP,350, 351, 353 manual Carburettor - reassembly, Cleaning and inspection

Repair instructions

Cleaning and inspection

Clean all the carburettor components in petrol. Use an airline to dry off the petrol from all components. Blow through all the channels in the carburettor body and check that they are not blocked.

Check that:

•The gasket, pump diaphragm and metering diaphragm are undamaged.

•There is no play in the throttle and choke valves.

•The needle valve and its lever arm are not worn.

•The fuel filter is undamaged.

•The tips of the high and low speed jet screws are not damaged.

•The air intake duct is not cracked.

Carburettor – reassembly

NOTE!

Cleanliness is very important when reassembling the carburettor. Tiny parti- cles of dirt can cause operating problems.

1

If the throttle and choke butterflies and their spindles were removed, these must be refitted. Lubricate the spindle bearings with light oil.

2

Insert the plug in the hole with the convex side upwards and expand it by pressing downwards with a drift.

3

Refit the high and low speed jet screws and springs, plus the idling screw. Fit the plastic caps over the high and low speed screws.

4

Fit the fuel filter, using the handle of a small screw- driver.

5

Fit the pump diaphragm, gasket and cover to the pump unit.

6

Fit the needle valve with lever arm, spindle and spring and tighten the screw.

Use a rule to check that the lever arm is level with the cover face. If necessary, the lever arm can be bent slightly.

7

Fit the metering diaphragm with its gasket and refit the cover to the metering unit.

8

Carry out pressure testing.

The item numbers in the diagram refer to the steps below (1–8).

32 – English